<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>loginpage</h1>
<h2>${message!''}</h2>
    <form action="./login" method="post">
        <input type="text" name="username"><br>
        <input type="password" name="password"><br>
        <input type="submit" value="提交">
    </form>


</body>
</html>